Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/translate/translate_manager_metrics_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/translate/translate_manager_metrics.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 using base::HistogramBase;
 using base::HistogramSamples;
 using base::StatisticsRecorder;
 
 namespace {
 
 class MetricsRecorder {
  public:
-  explicit MetricsRecorder(const char* key)
-      : key_(key),
-        base_samples_(NULL),
-        samples_(NULL) {
+  explicit MetricsRecorder(const char* key) : key_(key) {
     StatisticsRecorder::Initialize();
 
     HistogramBase* histogram = StatisticsRecorder::FindHistogram(key_);
     if (histogram)
       base_samples_ = histogram->SnapshotSamples();
   }
 
   void CheckInitiationStatus(int expected_disabled_by_prefs,
                              int expected_disabled_by_switch,
                              int expected_disabled_by_config,
@@ skipping 135 matching lines @@
 
 TEST(TranslateManagerMetricsTest, ReportedLocalesOnDisabledByPrefs) {
   const int ENGLISH = 25966;
 
   MetricsRecorder recorder(TranslateManagerMetrics::GetMetricsName(
       TranslateManagerMetrics::UMA_LOCALES_ON_DISABLED_BY_PREFS));
   EXPECT_EQ(0, recorder.GetTotalCount());
   TranslateManagerMetrics::ReportLocalesOnDisabledByPrefs("en");
   EXPECT_EQ(1, recorder.GetCount(ENGLISH));
 }